CN104275785A - Temperature control device and hot runner mold - Google Patents
Temperature control device and hot runner mold Download PDFInfo
- Publication number
- CN104275785A CN104275785A CN201410489667.2A CN201410489667A CN104275785A CN 104275785 A CN104275785 A CN 104275785A CN 201410489667 A CN201410489667 A CN 201410489667A CN 104275785 A CN104275785 A CN 104275785A
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- CN
- China
- Prior art keywords
- temperature
- switch
- temperature controller
- state relay
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 230000003750 conditioning effect Effects 0.000 claims description 14
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 11
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76003—Measured parameter
- B29C2945/7604—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Control Of Resistance Heating (AREA)
Abstract
The invention provides a temperature control device, which is used for controlling the temperature of a hot runner mold and comprises a solid-state relay, a temperature controller and a switching power supply; the input end of the switching power supply is connected to an alternating current power supply, the input end of the temperature controller is connected with the temperature measuring element, the output end of the temperature controller is connected to the output end of the switching power supply after being connected with the input end of the solid-state relay in series, and the temperature controller is used for controlling the on or off of the solid-state relay according to the temperature in the hot runner mold detected by the temperature measuring element; the output end of the solid-state relay is connected with a heating wire of the hot runner mold in series to form a heating branch, and the heating branch is connected to an alternating current power supply. The invention also relates to a hot runner mold. The temperature control device and the hot runner mold realize the heating control of the hot runner mold, and the temperature control device has the advantages of simple structure, wide application range, convenient use and maintenance and reduced use and maintenance cost.
Description
Technical field
The present invention relates to hot runner mould technical field, particularly relate to a kind of attemperating unit and hot runner mould.
Background technology
The temperature control box that general hot runner mould adopts the integrated circuit control panel of import to be formed usually is to control the heating of hot runner mould, not easily repair after but integrated circuit control panel breaks down, relevant spare and accessory parts are commercially difficult to find, need to carry out depot repair, and cost is higher and maintenance cycle is longer, versatility is poor, inconvenient maintenance.
Summary of the invention
In view of the present situation of prior art, the object of the present invention is to provide a kind of attemperating unit and hot runner mould, the structure of this attemperating unit is simple, versatility good and be convenient to maintenance.
For achieving the above object, the present invention adopts following technical scheme:
A kind of attemperating unit, the temperature for hot runner mould controls, and comprises solid-state relay, temperature controller and Switching Power Supply;
The input of described Switching Power Supply is connected to AC power, the input K1-1 of described temperature controller connects temperature element, the output K1 of described temperature controller connect described solid-state relay input K2-1 after be connected to the output of described Switching Power Supply, the described temperature controller temperature be used in the hot runner mould that detects according to described temperature element controls conducting or the shutoff of described solid-state relay;
The connect heater strip R of described hot runner mould of the output of described solid-state relay forms heating branch road, and described heating branch road is connected to described AC power.
Wherein in an embodiment, also comprise master switch QS, the input K1-1 of described temperature controller, the output K2 of described solid-state relay and described Switching Power Supply are connected respectively after described master switch QS and are connected to described AC power.
Wherein in an embodiment, also comprise the first switch S 0 and second switch S1;
The input K1-1 of described temperature controller connects successively after described second switch S1, described first switch S 0 and described master switch QS and is connected to described AC power.
Wherein in an embodiment, described first switch S 0 and described second switch S1 are the self-lock switch with indicator lamp.
Wherein in an embodiment, the quantity of described temperature controller, described solid-state relay and described second switch S1 is equal and be multiple, the input K1-1 of each described temperature controller described second switch S1 that connects forms temperature conditioning unit, is arranged in parallel between multiple described temperature conditioning unit;
The output K1 of each described temperature controller connects a described solid-state relay formation control branch road, is arranged in parallel between multiple described controlling brancher, and the corresponding described temperature conditioning unit of each described controlling brancher.
Wherein in an embodiment, the quantity of described heating branch road is multiple, and multiple described heating branch road is arranged with multiple described controlling brancher one_to_one corresponding respectively, i.e. the corresponding described controlling brancher of each heating branch road.
Wherein in an embodiment, the bottom of described solid-state relay is provided with heat dissipation base.
Wherein in an embodiment, the output voltage of described Switching Power Supply is direct current 24V, and the precision of described temperature controller is 0.01 degree Celsius.
Wherein in an embodiment, also comprise radiator fan and power supply indicator L, be connected to described AC power AC after master switch QS described in described Cascaded radiator fan, described power supply indicator L is in parallel with described radiator fan.
The invention still further relates to a kind of hot runner mould, comprise hot nozzle and flow distribution plate, also comprise the attemperating unit described in above-mentioned any one.
The invention has the beneficial effects as follows:
Attemperating unit of the present invention and hot runner mould, the input of temperature controller is connected temperature element, temperature element detects the temperature in hot runner mould, temperature controller output is connected with the input of solid-state relay, and the temperature in the hot runner mould that temperature controller detects according to temperature element controls conducting or the shutoff of solid-state relay; The heater strip of the output series connection hot runner mould of solid-state relay, solid-state relay for controlling the turn-on and turn-off of heater strip, thus achieves attemperating unit and controls the temperature of hot runner mould.And the structure of this attemperating unit is simple, applied widely, use and maintenance facilitates and reduces the cost of use and maintenance.
Accompanying drawing explanation
Fig. 1 is the electrical equipment layout of temperature conditioning unit one embodiment in attemperating unit of the present invention;
Fig. 2 is the electrical equipment layout of controlling brancher one embodiment in attemperating unit of the present invention;
The electrical equipment layout of branch road one embodiment is heated in Fig. 3 attemperating unit of the present invention;
Fig. 4 is the front view of attemperating unit one embodiment of the present invention.
Detailed description of the invention
In order to make technical scheme of the present invention clearly, below in conjunction with accompanying drawing, attemperating unit of the present invention and hot runner mould are described in further detail.Should be appreciated that specific embodiment described herein only in order to explain that the present invention is not intended to limit the present invention.
See Fig. 1 to Fig. 4, the attemperating unit of one embodiment of the invention comprises solid-state relay, temperature controller 1 and Switching Power Supply 2.The input of Switching Power Supply 2 is connected to AC power AC, and the input K1-1 of temperature controller 1 connects temperature element, and temperature element for detecting the temperature in hot runner mould, and sends the temperature in the hot runner mould detected to temperature controller 1.In the present embodiment, temperature element can be thermocouple equitemperature sensor.The output of Switching Power Supply 2 is connected to after the input K2-1 of the output K1 inline solid state relay of temperature controller 1.Temperature in the hot runner mould that temperature controller 1 detects according to temperature element controls conducting or the shutoff of solid-state relay.Switching Power Supply 2 is for being converted into dc source by AC power, and the DC voltage of stable output.
In the present embodiment, the output voltage of Switching Power Supply 2 is direct current 24V, is connected in DC circuit, the operating voltage that Switching Power Supply 2 is stable for solid-state relay provides after the input K2-1 of the output K1 inline solid state relay of temperature controller 1.
The heater strip R of the output K2 series connection hot runner mould of solid-state relay forms heating branch road, and this heating branch road is connected to AC power AC.Preferably, AC power AC is three-phase alternating current, and output voltage is 220V.The precision of temperature controller 1 is 0.01 degree Celsius, and the maximum temperature of temperature controller 1 is not less than 350 degrees Celsius.
Because solid-state relay has the advantages such as highly sensitive, switch speed is fast and electromagnetic interference is little, therefore, in the present embodiment, adopt solid-state relay to control the turn-on and turn-off of heater strip R, ensure that control accuracy and the sensitivity of temperature control box.In the present embodiment, solid-state relay is for controlling the turn-on and turn-off of heater strip R, and during heater strip R conducting, heater strip R heats hot runner mould, and the temperature in hot runner mould is raised.When heater strip R turns off, heater strip R stops heating hot runner mould, and the temperature in hot runner mould is reduced.
Temperature element detects the temperature in hot runner mould in real time, and the temperature in the hot runner mould detected is sent to temperature controller 1.The preset temperature of the temperature in the hot runner mould detected and temperature controller 1 compares by temperature controller 1.When the temperature in the hot runner mould detected is less than the preset temperature of temperature controller 1, temperature controller 1 controls solid-state relay conducting.After solid-state relay conducting, make the heater strip R conducting of hot runner mould, heater strip R starts to heat hot runner mould, and the temperature in hot runner mould is raised.When the temperature in the hot runner mould detected is greater than the preset temperature of temperature controller 1, temperature controller 1 controls solid-state relay and turns off.Solid-state relay closes has no progeny, and the heater strip R of hot runner mould is disconnected, and heater strip R stops the heating to hot runner mould, and the temperature in hot runner mould is reduced.
The input of temperature controller is connected temperature element, temperature element detects the temperature in hot runner mould, the output of temperature controller is connected with the input of solid-state relay, and the temperature in the hot runner mould that temperature controller 1 detects according to temperature element controls conducting or the shutoff of solid-state relay; The heater strip of the output series connection hot runner mould of solid-state relay, solid-state relay for controlling the turn-on and turn-off of heater strip, thus achieves attemperating unit and controls the temperature of hot runner mould.And the structure of this attemperating unit is simple, applied widely, use and maintenance facilitates and reduces the cost of use and maintenance.
As a kind of embodiment, this attemperating unit also comprises master switch QS, is connected to AC power AC and the output of the input of temperature controller, solid-state relay and Switching Power Supply 2 are connected respectively after master switch QS.Namely master switch QS is for controlling powering on or power-off of whole attemperating unit, when master switch QS closes, whole attemperating unit powers on, temperature element is made to start the temperature detected in hot runner mould, temperature controller 1 and Switching Power Supply 2 are started working, and AC power is converted into direct current and exports by Switching Power Supply 2.When master switch QS disconnects, whole attemperating unit power-off, temperature controller 1 and Switching Power Supply 2 power-off also quit work.
More preferably, the first switch S 0 and second switch S1 is also comprised.The input of temperature controller 1 is connected successively after second switch S1, the first switch S 0 and master switch QS and is connected to AC power AC.Namely, only when master switch QS, the first switch S 0 and second switch S1 are simultaneously closed, temperature controller 1 powers on.Preferably, the first switch S 0 and second switch S1 are the self-lock switch with indicator lamp.
In the present embodiment, the quantity of temperature controller 1, solid-state relay and second switch S1 is equal and be multiple.It should be understood that the model of multiple temperature controller 1 is not necessarily identical.In like manner, the model of multiple second switch S1 also can be different.Multiple solid-state relay also can select the solid-state relay of different model.
The input K1-1 of each temperature controller 1 second switch S1 that connects forms temperature conditioning unit, and second switch S1 is used for powering on of control temperature controller 1.Be arranged in parallel between multiple temperature conditioning unit, each temperature conditioning unit is connected successively respectively after the first switch S 0 and master switch QS and is connected to AC power AC.After master switch QS and the first switch S 0 close, can by controlling the closed of second switch S1 or disconnecting, the work of control temperature controller.
Such as, after master switch QS and the first switch S 0 close, when needing all temperature controllers 1 to carry out work simultaneously, should by all closed for the second switch S1 of each temperature controller 1 correspondence.When only needing portion temperature controller 1 to carry out work, only need the switch S 1 of need temperature controller 1 correspondence of work second to close, other do not need the second switch S1 of temperature controller 1 correspondence of work to be still in the state of disconnection.
The output K1 of each temperature controller 1 connects a solid-state relay formation control branch road, namely the output K1 of each temperature controller 1 connects the input K2-1 formation control branch road of a solid-state relay, multiple controlling brancher is arranged in parallel, in the present embodiment, multiple controlling brancher is connected to the output of Switching Power Supply 2.And the corresponding temperature conditioning unit of each controlling brancher, namely multiple temperature conditioning unit and multiple controlling brancher one_to_one corresponding are arranged, and each temperature conditioning unit controls corresponding controlling brancher work.
More preferably, the quantity of heating branch road is multiple, multiple heating branch road is arranged with multiple temperature conditioning unit one_to_one corresponding respectively, namely temperature control controller 1 controls the turn-on and turn-off of a solid-state relay, the conducting of heater strip R and disconnection in the heating flow channel that solid-state relay controls hot runner mould.
In the present embodiment, be provided with 12 heating flow channel in hot runner mould, correspondingly in each heating flow channel be provided with heater strip R, therefore, the quantity of heating branch road is 12.In order to realize the independent control of heater strip R in each heating flow channel, so the quantity of solid-state relay and temperature controller is also set as 12, namely a temperature controller 1 controls a solid-state relay, and solid-state relay controls the heater strip R in a heating flow channel.
When considering the laod unbalance of three-phase alternating current, there is the phenomenon of overload or underloading and the AC power AC voltage stabilizing power supply instability that causes in AC power AC a certain mutually.Therefore, in the present embodiment, according to the U phase of AC power AC, V phase and W phase, 12 heating branch roads are divided into three groups, are respectively first group of heating branch road 4, second group heating branch road 5 and the 3rd group of heating branch road 6.Make the load of each phase of AC power AC identical like this, meet the load balance of AC power AC.Wherein, first group of heating branch road 4 is connected to the U phase of AC power AC, and second group of heating branch road 5 is connected to the V phase of AC power AC, and the 3rd group of heating branch road 6 is connected to the W phase of AC power AC.
Preferably, master switch QS is three pole signle throw switch, and the rated current of master switch is not less than 64 amperes.Three contacts of three pole signle throw switch are connected between the U phase of AC power AC and zero line respectively, between the V phase of AC power AC and zero line, between the W phase of AC power AC and zero line N.
As a kind of embodiment, the bottom of solid-state relay is provided with heat dissipation base.Because solid-state relay caloric value is very large, therefore heat dissipation base is set in the bottom of solid-state relay and the heat that solid-state relay discharges is dispelled the heat.In the present embodiment, heat dissipation base is radiating fin, and is coated with heat-conducting silicone grease between radiating fin and the base of solid-state relay.In the present embodiment, the rated current of solid-state relay is more than or equal to 16 amperes.
As further improvement, this attemperating unit also comprises radiator fan 3 and power supply indicator L, and radiator fan 3 is connected after master switch QS and is connected to AC power AC, and namely master switch QS directly controls the opening and closing of radiator fan 3.In the present embodiment, the quantity of radiator fan 3 is two, is arranged in parallel between two radiator fans 3, and the power of radiator fan 3 is 60 watts.This attemperating unit also comprises box body, and the thickness of box body is not less than 1.5 millimeters, and the components and parts for the protection of attemperating unit are not damaged, and two radiator fans 3 are arranged on the both sides of the box body of attemperating unit.
Power supply indicator L is in parallel with radiator fan 3, and be namely connected to AC power AC after power supply indicator L series connection master switch QS, master switch QS directly controls lighting of power supply indicator L and extinguishes.When master switch QS closes, radiator fan 3 is opened, and power supply indicator L lights.When master switch QS disconnects, radiator fan 3 cuts out, and power supply indicator L extinguishes.
The invention still further relates to a kind of hot runner mould, comprise hot nozzle and flow distribution plate, also comprise the attemperating unit of above-mentioned any embodiment, attemperating unit is for controlling the heating of hot runner mould.
Attemperating unit of the present invention and hot runner mould, the input of temperature controller is connected temperature element, temperature element detects the temperature in hot runner mould, temperature controller output is connected with the input of solid-state relay, and the temperature in the hot runner mould that temperature controller detects according to temperature element controls conducting or the shutoff of solid-state relay; The heater strip of the output series connection hot runner mould of solid-state relay, solid-state relay for controlling the turn-on and turn-off of heater strip, thus achieves attemperating unit and controls the temperature of hot runner mould.And the structure of this attemperating unit is simple, applied widely, use and maintenance facilitates and reduces the cost of use and maintenance.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an attemperating unit, the temperature for hot runner mould controls, and it is characterized in that:
Comprise solid-state relay, temperature controller (1) and Switching Power Supply (2);
The input of described Switching Power Supply (2) is connected to AC power AC, the input K1-1 of described temperature controller (1) connects temperature element, the output K1 of described temperature controller (1) connect described solid-state relay input K2-1 after be connected to the output of described Switching Power Supply (2), described temperature controller (1) controls conducting or the shutoff of described solid-state relay for the temperature in the hot runner mould that detects according to described temperature element;
The connect heater strip R of described hot runner mould of the output K2 of described solid-state relay forms heating branch road, and described heating branch road is connected to described AC power AC.
2. attemperating unit according to claim 1, is characterized in that:
Also comprise master switch QS, the input K1-1 of described temperature controller (1), the output K2 of described solid-state relay and described Switching Power Supply (2) are connected respectively after described master switch QS and are connected to described AC power AC.
3. attemperating unit according to claim 2, is characterized in that:
Also comprise the first switch S 0 and second switch S1;
The input K1-1 of described temperature controller (1) connects successively after described second switch S1, described first switch S 0 and described master switch QS and is connected to described AC power AC.
4. attemperating unit according to claim 3, is characterized in that:
Described first switch S 0 and described second switch S1 are the self-lock switch with indicator lamp.
5. attemperating unit according to claim 3, is characterized in that:
The quantity of described temperature controller (1), described solid-state relay and described second switch S1 is equal and be multiple, the input K1-1 of each described temperature controller (1) the described second switch S1 that connects forms temperature conditioning unit, is arranged in parallel between multiple described temperature conditioning unit;
The output K1 of each described temperature controller (1) connects a described solid-state relay formation control branch road, is arranged in parallel between multiple described controlling brancher, and the corresponding described temperature conditioning unit of each described controlling brancher.
6. attemperating unit according to claim 5, is characterized in that:
The quantity of described heating branch road is multiple, and multiple described heating branch road is arranged with multiple described controlling brancher one_to_one corresponding respectively, i.e. the corresponding described controlling brancher of each heating branch road.
7. the attemperating unit according to any one of claim 1-6, is characterized in that:
The bottom of described solid-state relay is provided with heat dissipation base.
8. the attemperating unit according to any one of claim 1-6, is characterized in that:
The output voltage of described Switching Power Supply (2) is direct current 24V, and the precision of described temperature controller (1) is 0.01 degree Celsius.
9. the attemperating unit according to any one of claim 2-6, is characterized in that:
Also comprise radiator fan (3) and power supply indicator L, described radiator fan (3) is connected after described master switch QS and is connected to described AC power AC, and described power supply indicator L is in parallel with described radiator fan (3).
10. a hot runner mould, comprises hot nozzle and flow distribution plate, it is characterized in that, also comprises the attemperating unit described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489667.2A CN104275785A (en) | 2014-09-23 | 2014-09-23 | Temperature control device and hot runner mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489667.2A CN104275785A (en) | 2014-09-23 | 2014-09-23 | Temperature control device and hot runner mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104275785A true CN104275785A (en) | 2015-01-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410489667.2A Pending CN104275785A (en) | 2014-09-23 | 2014-09-23 | Temperature control device and hot runner mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104275785A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107443697A (en) * | 2017-09-29 | 2017-12-08 | 高滨 | A kind of plastic mould hot runner temperature controller |
| CN108859045A (en) * | 2018-08-28 | 2018-11-23 | 上海塑尔热流道电气有限公司 | A kind of hot runner system temperature control box monitor station |
| CN114779846A (en) * | 2022-05-31 | 2022-07-22 | 南京工业大学 | Intelligent electric heating control system and method for large tank |
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| JPS61115108A (en) * | 1984-11-09 | 1986-06-02 | Purasutoron Kk | Temperature control method of hot runner multipoint gate |
| JPH09150444A (en) * | 1995-11-29 | 1997-06-10 | Hitachi Metals Ltd | Method for controlling temperature of hot runner nozzle |
| JPH11115012A (en) * | 1997-10-14 | 1999-04-27 | Mitsubishi Heavy Ind Ltd | Temperature controller of injection mold |
| CN202192748U (en) * | 2011-07-20 | 2012-04-18 | 中达电通股份有限公司 | Hot runner control system |
| CN203092917U (en) * | 2012-12-31 | 2013-07-31 | 长城汽车股份有限公司 | Anti-running device of injection molding machine |
| CN103481480A (en) * | 2012-06-12 | 2014-01-01 | 住友重机械工业株式会社 | Injection molding machine |
| CN204109305U (en) * | 2014-09-23 | 2015-01-21 | 格力电器（武汉）有限公司 | Temperature control device and hot runner mold |
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2014
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61115108A (en) * | 1984-11-09 | 1986-06-02 | Purasutoron Kk | Temperature control method of hot runner multipoint gate |
| JPH09150444A (en) * | 1995-11-29 | 1997-06-10 | Hitachi Metals Ltd | Method for controlling temperature of hot runner nozzle |
| JPH11115012A (en) * | 1997-10-14 | 1999-04-27 | Mitsubishi Heavy Ind Ltd | Temperature controller of injection mold |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107443697A (en) * | 2017-09-29 | 2017-12-08 | 高滨 | A kind of plastic mould hot runner temperature controller |
| CN108859045A (en) * | 2018-08-28 | 2018-11-23 | 上海塑尔热流道电气有限公司 | A kind of hot runner system temperature control box monitor station |
| CN114779846A (en) * | 2022-05-31 | 2022-07-22 | 南京工业大学 | Intelligent electric heating control system and method for large tank |
| CN114779846B (en) * | 2022-05-31 | 2023-08-08 | 南京工业大学 | Intelligent electric heating control system and method for large tank |
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Application publication date: 20150114 |